ABB RELION 670 Series Technical Manual page 1099

1MRK 502 066-UUS B
16.9 Limit counter L4UFCNT
16.9.1 Identification
16.9.1.1 Identification
Function description
Limit counter
16.9.2 Functionality
The 12 Up limit counter L4UFCNT provides a settable counter with four independent limits where
the number of positive and/or negative sides on the input signal are counted against the setting
values for limits. The output for each limit is activated when the counted value reaches that limit.
Overflow indication is included for each up-counter.
16.9.3 Operation principle
Limit counter (L4UFCNT) counts the number of positive and/or negative sides on the binary input
signal depending on the function settings. L4UFCNT also checks if the accumulated value is equal
or greater than any of its four settable limits. The four limit outputs will be activated relatively on
reach of each limit and remain activated until the reset of the function. Moreover, the content of
L4UFCNT is stored in flash memory and will not be lost at an auxiliary power interruption.
16.9.3.1 Design
Figure 568
Technical manual
IEC 61850
identification
illustrates the general logic diagram of the function.
IEC 60617
identification
L4UFCNT
GUID-22E141DB-38B3-462C-B031-73F7466DD135 v1
GUID-F3FB7B33-B189-4819-A1F0-8AC7762E9B7E v2
ANSI/IEEE C37.2
device number
-
GUID-13157EAB-1686-4D2E-85DF-EC89768F3572 v5
GUID-4D58423F-329C-4553-9FAF-E55A368849A5 v2
GUID-B643C994-D0BA-4BE9-BACB-ADEA0197CAE4 v1
Section 16
Monitoring
1093